US6012320A - Leaf spring straightening apparatus - Google Patents
Leaf spring straightening apparatus Download PDFInfo
- Publication number
- US6012320A US6012320A US09/007,267 US726798A US6012320A US 6012320 A US6012320 A US 6012320A US 726798 A US726798 A US 726798A US 6012320 A US6012320 A US 6012320A
- Authority
- US
- United States
- Prior art keywords
- leaf spring
- curved section
- legs
- spring
- straightening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/16—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially adapted methods or means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
- B21D53/886—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards leaf springs
Definitions
- This invention relates generally to apparatus for straightening a folded heated leaf spring and more particularly to apparatus for straightening a heated leaf spring that has been folded into a substantially flat "U" shaped configuration during a process for simultaneously tapering opposite ends thereof.
- the apparatus of the present invention is particularly applicable thereto as the processes disclosed therein relate to apparatus for simultaneously tapering opposite ends of a heated leaf spring during which the heated leaf spring is straightened after having been folded or bent into a substantially flat "U" shaped configuration of which the coinventors of the present invention are amongst the coinventors of U.S. Pat. No. 5,001,918.
- the straightening apparatus of the present invention provides however an improvement over the straightening apparatus disclosed in U.S. Pat. No. 5,001,918 in that it is adapted to prevent warpage from occurring at the fold or curved section of the leaf spring during the straightening process.
- FIG. 1 is a top elevation view of a machine taken along view line 1--1 in FIG. 2 operating a preferred embodiment of apparatus for the invention referenced by numeral 100;
- FIG. 2 is a side elevation view of the machine of FIG. 1;
- FIG. 3 is a plan elevation view of a folded leaf spring prior to being straightened by apparatus 100
- FIGS. 4A-4C are schematic diagrams of the process by which apparatus 100 straightens a folded heated leaf spring
- FIG. 5 is a partial top elevation view of a preferred mechanism for rotating certain components of apparatus 100 in the form of a pair of racks (40, 40') and pinions (36, 36'); and
- FIG. 6 is a side elevation view of the mechanism of FIG. 5 taken along view line 6--6.
- apparatus 100 is mounted on a machine that includes a hydraulic cylinder 16, a pair of spaced-apart shafts 20 and 20', a pair of nitrogen springs 18 and 18', and a pair of tension springs 22 and 22' whose operation is described hereafter in greater detail.
- Apparatus 100 is operative to straighten a heated folded leaf spring having a pair of spaced-apart legs 6 and 6' best described with respect to FIG. 3 that is heated to a red state at a temperature of typically between about 1600F. and about 2200F.
- Legs 6 and 6' taper away from opposite ends of a curved section 24 having a convex side 26 and a concave side 28.
- Curved section 24 has a radius of curvature "r" whose origin “O” is located at the intersection of orthogonal axis "x" and “y” of which axis "y” bisects the space between legs 6 and 6'.
- cylinder 16 is operative to reciprocate shafts 20 and 20' in opposite directions as shown by the arrows.
- a carriage assembly (not referenced) carries a support ram (14) that reciprocates in unison with shafts 20 and 20' and is cushioned therefrom by spaced-apart hydrogen springs 18 and 18' whose function is to keep the heated folded spring tight in a tightly held position apparatus 100.
- Ram 14 is operative to engage the convex side of curved section 24 of the leaf spring to provide cushioned support there against during the straightening process.
- a pair of tension springs 22 and 22' as shown in FIGS. 1 and 2 are operative to urge shafts 20 and 20' back towards the viewers right once the straightening process is complete and cylinder 16 enters into an exhaust stage.
- FIGS. 4A-4C The process by which the heated folded leaf spring is straightened as best shown in FIGS. 4A-4C in which apparatus 100 is shown as having a pair of spaced-apart rotary block members 8 and 8' having respective central rotational axis "z" and "z” that are orthogonal to the plane of axis "x” and “y” and are located on axis "x" respectively outwardly adjacent the sides of legs 6 and 6' facing away from each other.
- Block members 8 and 8' are rotated in unison in opposite directions preferably by means of a rack and pinion arrangement such as shown in FIGS. 5 and 6 in which racks 40 and 40' are secured to shafts 20 and 20' respectively and reciprocate therewith and are respectively operative to rotate pinion gears 36 and 36' by means of having spaced windows such as referenced by numeral 42 that meshingly engage the pinion gear teeth such as 38 and 38' and cause them to rotate in opposite directions and which in turn are secured to and cause block member 8 and 8' to rotate in opposite directions in unison therewith.
- racks 40 and 40' are secured to shafts 20 and 20' respectively and reciprocate therewith and are respectively operative to rotate pinion gears 36 and 36' by means of having spaced windows such as referenced by numeral 42 that meshingly engage the pinion gear teeth such as 38 and 38' and cause them to rotate in opposite directions and which in turn are secured to and cause block member 8 and 8' to rotate in opposite directions in unison therewith.
- Block members 8 and 8' respectively include channels 30 and 30' therein that at the start of the straightening process are positioned to respectively receive legs 6 and 6' at the folded heated leg spring thereon.
- Channels 30 and 30' have respective outer walls 10 and 10' that extend beyond axis "X" for a distances "D" to free ends 34 and 34' such that the sum of both distances (2"D") is substantially the same as the length of the convex side 26 of curved section 24 of the folded heated leaf spring.
- Channels 30 and 30' include inner walls 12 and 12' on the concave side of curved section 24 that extend for a prescribed distance towards axis "x" and thence turn angularly toward each other as best shown in FIGS. 4A-4C such that they release from the concave side of curved section 24 during the straightening process.
- the heated folded leaf spacing is dropped vertically onto blocks 8 and 8' with its legs 6 and 6' positioned in channels 30 and 30' as previously described.
- Actuation of cylinder 16 urges shafts 20 and 20' (and racks 40 and 40') toward the viewers left in FIG. 1 which in turn causes pinion gear 36 to rotate counterclockwise in unison with pinion gear 36' which is caused to rotate clockwise which in turn causes block members 8 and 8' to rotate counterclockwise and clockwise respectively as shown by the arrows in FIG. 4B.
- block members 8 and 8' urge walls 12 and 12' against legs 6 and 6' respectively and spread them angularly away from each other as shown by the arrows in FIG. 4B whilst free-ends 34 and 34' of walls 10 and 10' rotate towards each other until in close adjacent relationship with each other enabling walls 10 and 10' to provide support against the outer convex side of curved section 24 as it becomes straightened during the straightening process which is further supplemented by ram 14 which holds walls 10 and 10' against the convex side of curved section 24 when legs 6 and 6' are in substantially alignment with each other after which the straightened leaf spring is removed from apparatus 100 for cooling and other additional operations that may be desired.
Abstract
Description
Claims (2)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/007,267 US6012320A (en) | 1998-01-14 | 1998-01-14 | Leaf spring straightening apparatus |
AU20197/99A AU2019799A (en) | 1998-01-14 | 1998-12-28 | Leaf spring straightening apparatus |
DE19882960T DE19882960T1 (en) | 1998-01-14 | 1998-12-28 | Device for straightening leaf springs |
PCT/US1998/027754 WO1999036201A1 (en) | 1998-01-14 | 1998-12-28 | Leaf spring straightening apparatus |
CA002315402A CA2315402A1 (en) | 1998-01-14 | 1998-12-28 | Leaf spring straightening apparatus |
US09/353,755 US6173599B1 (en) | 1998-01-14 | 1999-07-14 | Leaf spring straightening apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/007,267 US6012320A (en) | 1998-01-14 | 1998-01-14 | Leaf spring straightening apparatus |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/353,755 Continuation-In-Part US6173599B1 (en) | 1998-01-14 | 1999-07-14 | Leaf spring straightening apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US6012320A true US6012320A (en) | 2000-01-11 |
Family
ID=21725174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/007,267 Expired - Fee Related US6012320A (en) | 1998-01-14 | 1998-01-14 | Leaf spring straightening apparatus |
Country Status (5)
Country | Link |
---|---|
US (1) | US6012320A (en) |
AU (1) | AU2019799A (en) |
CA (1) | CA2315402A1 (en) |
DE (1) | DE19882960T1 (en) |
WO (1) | WO1999036201A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6173599B1 (en) * | 1998-01-14 | 2001-01-16 | Oxford Suspension, Inc. | Leaf spring straightening apparatus |
US6460395B1 (en) * | 2001-05-07 | 2002-10-08 | Vought Aircraft Industries, Inc. | System and method for bending a structural member |
US20040035582A1 (en) * | 2002-08-22 | 2004-02-26 | Zupanick Joseph A. | System and method for subterranean access |
US20110215985A1 (en) * | 2004-06-10 | 2011-09-08 | Raysat Antenna Systems, L.L.C. | Applications for Low Profile Two Way Satellite Antenna System |
CN103599965A (en) * | 2013-10-23 | 2014-02-26 | 南通皋液液压机有限公司 | Shaping hydraulic machine for high-speed rail tail hooking frame |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101934308B (en) * | 2010-08-20 | 2012-06-13 | 浙江大学 | Method and device for straightening multi-scale bending guide rail |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1066247A (en) * | 1912-10-31 | 1913-07-01 | Eugene L Brown Jr | Rod-bending apparatus. |
US3824834A (en) * | 1973-03-05 | 1974-07-23 | H Durham | Cable bender |
US4716757A (en) * | 1986-08-25 | 1988-01-05 | Advanced Cardiovascular Systems, Inc. | Guide wire tip shaping tool and method |
JPS63137518A (en) * | 1986-11-27 | 1988-06-09 | Katsuteru Araki | Method and device for bending pipe |
US4798073A (en) * | 1985-12-13 | 1989-01-17 | Helmut Dischler | Bending machine for bending bars, channels, sections and the like |
US5001918A (en) * | 1987-11-04 | 1991-03-26 | Stepanenko Alexandr V | Method and apparatus for making blanks of a profile varying lengthwise |
US5588322A (en) * | 1992-04-06 | 1996-12-31 | Bending Tooling S.R.L. | Universal support and positioning structure for tools used by an elongate element bending machine |
US5836193A (en) * | 1996-11-27 | 1998-11-17 | Aluminum Company Of America | Apparatus for forming elongated metal articles and related method |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63137513A (en) * | 1986-11-26 | 1988-06-09 | Kobe Steel Ltd | Control method for preventing over-cooling of tail end of steel plate |
-
1998
- 1998-01-14 US US09/007,267 patent/US6012320A/en not_active Expired - Fee Related
- 1998-12-28 CA CA002315402A patent/CA2315402A1/en not_active Abandoned
- 1998-12-28 AU AU20197/99A patent/AU2019799A/en not_active Abandoned
- 1998-12-28 WO PCT/US1998/027754 patent/WO1999036201A1/en active Application Filing
- 1998-12-28 DE DE19882960T patent/DE19882960T1/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1066247A (en) * | 1912-10-31 | 1913-07-01 | Eugene L Brown Jr | Rod-bending apparatus. |
US3824834A (en) * | 1973-03-05 | 1974-07-23 | H Durham | Cable bender |
US4798073A (en) * | 1985-12-13 | 1989-01-17 | Helmut Dischler | Bending machine for bending bars, channels, sections and the like |
US4716757A (en) * | 1986-08-25 | 1988-01-05 | Advanced Cardiovascular Systems, Inc. | Guide wire tip shaping tool and method |
JPS63137518A (en) * | 1986-11-27 | 1988-06-09 | Katsuteru Araki | Method and device for bending pipe |
US5001918A (en) * | 1987-11-04 | 1991-03-26 | Stepanenko Alexandr V | Method and apparatus for making blanks of a profile varying lengthwise |
US5588322A (en) * | 1992-04-06 | 1996-12-31 | Bending Tooling S.R.L. | Universal support and positioning structure for tools used by an elongate element bending machine |
US5836193A (en) * | 1996-11-27 | 1998-11-17 | Aluminum Company Of America | Apparatus for forming elongated metal articles and related method |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6173599B1 (en) * | 1998-01-14 | 2001-01-16 | Oxford Suspension, Inc. | Leaf spring straightening apparatus |
WO2001005533A1 (en) * | 1999-07-14 | 2001-01-25 | Oxford Suspension, Inc. | Leaf spring straightening apparatus |
US6460395B1 (en) * | 2001-05-07 | 2002-10-08 | Vought Aircraft Industries, Inc. | System and method for bending a structural member |
US20040035582A1 (en) * | 2002-08-22 | 2004-02-26 | Zupanick Joseph A. | System and method for subterranean access |
US20110215985A1 (en) * | 2004-06-10 | 2011-09-08 | Raysat Antenna Systems, L.L.C. | Applications for Low Profile Two Way Satellite Antenna System |
CN103599965A (en) * | 2013-10-23 | 2014-02-26 | 南通皋液液压机有限公司 | Shaping hydraulic machine for high-speed rail tail hooking frame |
Also Published As
Publication number | Publication date |
---|---|
AU2019799A (en) | 1999-08-02 |
WO1999036201A1 (en) | 1999-07-22 |
DE19882960T1 (en) | 2001-01-18 |
CA2315402A1 (en) | 1999-07-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: EATON CORPORATION, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STEPANENKO, ALEXANDR VASYLEVICH;KOROL, VLADIMIR ANDREEVICH;GRECHENKO, ALEXANDR PAVLOVICH;REEL/FRAME:008927/0808 Effective date: 19971219 |
|
AS | Assignment |
Owner name: OXFORD SUSPENSION, INC., MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EATON CORPORATION;REEL/FRAME:009187/0785 Effective date: 19980401 |
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Owner name: CITICORP USA, INC., NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:BANK ONE, MICHIGAN;REEL/FRAME:011122/0703 Effective date: 20000801 Owner name: CITICORP USA, INC., NEW YORK Free format text: SECURITY AGREEMENT;ASSIGNOR:OXFORD AUTOMOTIVE, INC.;REEL/FRAME:011390/0695 Effective date: 20000801 |
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Owner name: BNY MIDWEST TRUST COMPANY, AS ADMINISTRATIVE AGENT Free format text: SECURITY INTEREST;ASSIGNORS:OXFORD AUTOMOTIVE, INC.;LOBDELL EMERY CORPORATION;OASP, INC.;AND OTHERS;REEL/FRAME:014892/0925 Effective date: 20031104 |
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